New member hello and Cymbidium question

[TannD01]

Hello, I'm a new member to the orchid board. I have several Phals that are growing pretty good. About a month ago I obtained a Cymbidium back bulb and have read how to attempt to get new growths on them. The bulb still has green but minimal roots. I have it in a pot of orchid bark mix in a zip lock bag. Two weeks ago I began to see two small purple looking nodes have appeared, one on each side of the back bulb. They don't seem to be growing very fast. I have searched the internet and boards but I don't see anything showing a cymbidium at this stage. My questions is this: Is this the beginning of new growth? How long does it usually take to see new growth forming on a back bulb? Am I just being impatient?